Introductory Physics Homework Help Forum

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Free introductory physics homework help step by step from qualified mentors. Algebra and calculus based general physics homework. High school and undergraduate level.

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Homework Help Guidelines for Students and Helpers

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Sep 23, 2014

Replies: 2

Views: 56K

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Hey! I posted in homework help but now it's gone!

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May 10, 2014

Replies: 0

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Homework Help: Introductory Physics Formulary

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Mar 17, 2012

Replies: 6

Views: 131K

Special relativity and Lorentz Transformation Exercise

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50 minutes ago

Replies: 32

Views: 169

Measuring particle mass in eV

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Today, 2:17 AM

Replies: 2

Views: 13

Displacement of particle

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Today, 1:26 AM

Replies: 5

Views: 54

Magnetization of ferromagnetic material

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Today, 12:14 AM

Replies: 2

Views: 36

A balloon and a stone

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Yesterday, 9:13 AM

Replies: 43

Views: 338

Confusion about whether to use the specific heat of water or ice

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Yesterday, 6:11 AM

Replies: 4

Views: 46

How does the presence of a dielectric change the max V of a capacitor?

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Yesterday, 4:21 AM

Replies: 6

Views: 49

A rolling ball, find distance traveled

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Wednesday, 10:29 PM

Replies: 4

Views: 80

Mean energy density of solar radiation and magnitude of Poynting vector

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Wednesday, 12:37 PM

Replies: 1

Views: 91

Average Separation between molecules in hydrogen at STP (Alonso Finn Problem)

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Wednesday, 7:56 AM

Replies: 15

Views: 191

To find the possible angles of two leaning planks supporting a third plank via friction

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Tuesday, 5:00 PM

Replies: 6

Views: 79

Comparing hydrostatic forces at the bottom of these 3 containers

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Tuesday, 1:36 PM

Replies: 22

Views: 128

Natural angular frequency

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Tuesday, 10:54 AM

Replies: 5

Views: 2K

How to use Kirchhoff's voltage law on this circuit?

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Tuesday, 8:50 AM

Replies: 16

Views: 105

Is this a possible solution to Verma's Exercise 12, Chapter 5? (A rope and two pulleys lifting a weight)

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Tuesday, 6:40 AM

Replies: 4

Views: 42

Calculating the force required to push a steel rod up 50 cm into a water filled steel tank

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Tuesday, 3:51 AM

Replies: 24

Views: 252

Conservation of Momentum problem

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Monday, 9:45 PM

Replies: 1

Views: 42

Finding acceleration from position formula

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Monday, 9:42 PM

Replies: 4

Views: 123

Magnetic working point

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Monday, 5:22 PM

Replies: 2

Views: 91

Finding the coefficients of a Resistance vs. Temp curve

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Monday, 11:33 AM

Replies: 3

Views: 38

Solenoid pendulum frequency

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Monday, 11:01 AM

Replies: 7

Views: 135

Morin's mechanics problem 2.3 (motionless chain)

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Monday, 4:26 AM

Replies: 2

Views: 114

Halliday Resnick Krane Chapter 2 Problem 30: Juggling Five Balls

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Monday, 2:22 AM

Replies: 3

Views: 47

Maximize Range of Projectile Launched from Cliff

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Sunday, 7:13 PM

Replies: 17

Views: 228

Show that ##\int \frac{d\vec{a}}{d} = \frac{4}{3}\pi \vec{r}##

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Saturday, 6:45 PM

Replies: 21

Views: 194

Intensity Distribution of Superposition of 2 Waves

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Saturday, 2:29 PM

Replies: 5

Views: 106

Kepler's Third Law vs Conservation of angular momentum

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Saturday, 11:59 AM

Replies: 8

Views: 103

Potential due to a finite charged wire

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Jan 14, 2022

Replies: 4

Views: 68

Standing Waves in a tube closed at both ends

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Jan 13, 2022

Replies: 5

Views: 91

Newton's law question involving force and acceleration

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Jan 13, 2022

Replies: 4

Views: 129

Maximum charge on a spherical capacitor

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Jan 13, 2022

Replies: 4

Views: 57

Weight of gold chain when dropped on a weighing scale

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Jan 13, 2022

Replies: 12

Views: 142

Find tangential velocity given radius and the coefficient of friction

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Jan 12, 2022

Replies: 3

Views: 84

Light incident on a sphere, focused at a distance ##2R##

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Jan 12, 2022

Replies: 2

Views: 62

Mass, acceleration and velocity

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Jan 12, 2022

Replies: 3

Views: 79

SOS please help -- Questions about mass, acceleration and velocity

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Jan 12, 2022

Replies: 4

Views: 139

Torque and forces (Beginner level)

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Jan 12, 2022

Replies: 14

Views: 138

Torque exerted on rolling cylinder

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Jan 12, 2022

Replies: 6

Views: 117

Rigid body dynamics problem, general motion analysis applied to human forearm drinking beer

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Jan 12, 2022

Replies: 24

Views: 248

Prove vectors are orthogonal

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Jan 11, 2022

Replies: 4

Views: 84

Circular Motion Problem -- Ball on a String Spinning in a Vertical Circle

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Jan 11, 2022

Replies: 2

Views: 98

Bohr radius of Earth-Sun system

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Jan 11, 2022

Replies: 5

Views: 130

Forces that act on a physical pendulum

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Jan 10, 2022

Replies: 7

Views: 92

Physics numerical solve

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Jan 10, 2022

Replies: 1

Views: 75

Distance moved in two different inertial frames

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Jan 10, 2022

Replies: 11

Views: 128

Shift in position of plank when a man moves on it (Centre of mass)

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Jan 10, 2022

Replies: 11

Views: 118

Mass of satellite

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Jan 9, 2022

Replies: 16

Views: 151

Trouble understanding total mechanical energy and the second law of Newton

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Jan 9, 2022

Replies: 2

Views: 84

Finding the frequency of a string based on Mass and Tension

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Jan 8, 2022

Replies: 1

Views: 99

Problem of spring block system: force vs conservation of energy

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Jan 8, 2022

Replies: 20

Views: 241

Intensity of a laser beam at a certain distance

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Jan 8, 2022

Replies: 13

Views: 88

Help in solving an electricity circuit problem involving Kirchoff's law

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Jan 7, 2022

Replies: 7

Views: 124

Trouble understanding the influence of a real spring in a system

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Jan 6, 2022

Replies: 3

Views: 135

Activity of Nuclide B

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Jan 6, 2022

Replies: 5

Views: 111

Kinematic Equations in Projectile Motion (this approach is not working)

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Jan 6, 2022

Replies: 16

Views: 164

Coulomb's force - magnitude of the electric force

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Jan 6, 2022

Replies: 11

Views: 1K

Potential difference between two points in an electric field

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Jan 6, 2022

Replies: 1

Views: 77

Calculating the velocity of a head-on impact between two suns

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Jan 6, 2022

Replies: 6

Views: 112

Simple Question: Deriving V = dW/dq for a circuit

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Jan 6, 2022

Replies: 7

Views: 182

Pendulum (weight on a string) released at an angle and the string hits a peg...

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Jan 5, 2022

Replies: 3

Views: 92

Question on sound intensity and dB

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Jan 5, 2022

Replies: 8

Views: 107

Relationship between E and V in space

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Jan 5, 2022

Replies: 27

Views: 364

Distance between rocket and object

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Jan 5, 2022

Replies: 30

Views: 259

Roundtrip by Plane

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Jan 5, 2022

Replies: 26

Views: 253

Fringing of electric field

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Jan 4, 2022

Replies: 6

Views: 93

How does metal sphere determine the potential of the plane by symmetry?

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Jan 3, 2022

Replies: 15

Views: 241

Single Loop Potential difference -- sign issue

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Jan 3, 2022

Replies: 8

Views: 76

Find the unit vectors perpendicular to the given vectors

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Jan 3, 2022

Replies: 20

Views: 175

Perfectly inelastic collision of two moving and rotating disks

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Jan 1, 2022

Replies: 9

Views: 136

Question on Resolving Power of Diffraction Grating

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Jan 1, 2022

Replies: 3

Views: 127

A bullet collides perfectly elastically with one end of a rod

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Jan 1, 2022

Replies: 21

Views: 170

Work done by friction

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Jan 1, 2022

Replies: 7

Views: 154

How to prove that a force is conservative?

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Jan 1, 2022

Replies: 40

Views: 468

"Doubling up" effect when pulling a chain on a table

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Dec 30, 2021

Replies: 11

Views: 167

Compton Effect, angle of deflection

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Dec 29, 2021

Replies: 1

Views: 4K

A.C. power supply voltage amplitude questions

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Dec 29, 2021

Replies: 6

Views: 118

Effect of temperature on vibrational frequency of a violin string

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Dec 29, 2021

Replies: 5

Views: 111

Recognizing Thermodynamic Scenarious (Work Done)

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Dec 28, 2021

Replies: 5

Views: 125

Disk and Stick Collision

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Dec 28, 2021

Replies: 2

Views: 103

Simple question about Lenz' Law

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Dec 27, 2021

Replies: 1

Views: 88

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Contradiction in Entropy

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Dec 27, 2021

Replies: –

Views: –

Rocket motion in space

Last Post
Dec 27, 2021

Replies: 1

Views: 98

Glancing Elastic Collision Questionnaire

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Dec 26, 2021

Replies: 6

Views: 121

What does 'dv and dx' mean in f = eta X A (dv/dx)?

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Dec 26, 2021

Replies: 6

Views: 4K

Modeling a kongming lantern (sky lantern)

Last Post
Dec 25, 2021

Replies: 6

Views: 183

Glancing elastic collision, and center of mass

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Dec 25, 2021

Replies: 17

Views: 2K

Determine the velocity of a particle in mass spectrometry

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Dec 25, 2021

Replies: 3

Views: 85

Self Study - Foundations of Electromagnetic Theory Problem 2-1 (two charged particles hanging on strings)

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Dec 25, 2021

Replies: 43

Views: 444

Force Diagram of Shelf

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Dec 25, 2021

Replies: 7

Views: 209

Angular momentum of the particle about point P as a function of time

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Dec 25, 2021

Replies: 13

Views: 189

Rolling without slipping down an inclined plane

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Dec 24, 2021

Replies: 18

Views: 393

Tetherball rope wrapping around a pole

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Dec 23, 2021

Replies: 5

Views: 198

Derive an expression for power in terms of potential difference and current

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Dec 23, 2021

Replies: 5

Views: 124

Maximum angle made by rotating hinge with energy and gravity

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Dec 23, 2021

Replies: 12

Views: 199

Forces within an elevator cab

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Dec 22, 2021

Replies: 38

Views: 595

Acceleration-Time Graph and Velocity Multiple Choice Question

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Dec 22, 2021

Replies: 8

Views: 142

Finding the output V of a filter

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Dec 21, 2021

Replies: 19

Views: 208

Unbalanced force to find altitude of airplane

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Dec 21, 2021

Replies: 4

Views: 192

Does work = neg or pos change in potential energy?

Last Post
Dec 21, 2021

Replies: 12

Views: 217

To find direction and magnitude of forces acting in a system

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Dec 20, 2021

Replies: 2

Views: 131

Intro Physics Homework Help

Get introductory physics homework help, step by step from mentors. We do not give answers but guide you to it with your effort.

This is for algebra and calculus based general physics homework. Usually this is high school and undergraduate level problems.

Please use the template when asking for help, include all information and provide a reasonable attempt at a solution.

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